2162601665 has 16 divisors (see below), whose sum is σ = 3021815808. Its totient is φ = 1454945856.

The previous prime is 2162601653. The next prime is 2162601677. The reversal of 2162601665 is 5661062612.

It is an interprime number because it is at equal distance from previous prime (2162601653) and next prime (2162601677).

It is not a de Polignac number, because 2162601665 - 2¹⁸ = 2162339521 is a prime.

It is a super-2 number, since 2×2162601665² = 9353691922921544450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581057 + ... + 584766.

It is an arithmetic number, because the mean of its divisors is an integer number (188863488).

Almost surely, 2^2162601665 is an apocalyptic number.

It is an amenable number.

2162601665 is a deficient number, since it is larger than the sum of its proper divisors (859214143).

2162601665 is a wasteful number, since it uses less digits than its factorization.

2162601665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165888.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2162601665 is about 46503.7811903505. The cubic root of 2162601665 is about 1293.1795981326.

The spelling of 2162601665 in words is "two billion, one hundred sixty-two million, six hundred one thousand, six hundred sixty-five".